Defined.ai provides a web-based platform for defining, executing, and managing human-in-the-loop data annotation projects. It enables AI development teams to generate high-quality ground truth datasets across various data modalities directly through a browser interface, facilitating the training and validation of machine learning models without requiring extensive in-house annotation infrastructure.
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Defined.ai (formerly Figure Eight) Website Full Guide (2026)
Provides AI training data and labeling tools.
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3.4 (AI Aggregated)
Updated May 26, 2026
Introduction
Key Features
Core Capabilities
Multi-modal data ingestion interface
Customizable annotation tool palette (e.g., bounding box, polygon, keypoint, transcription)
Real-time quality control dashboard
Project progress and throughput monitoring
Additional Details
Granular instruction set editor for annotator guideline
Inter-annotator agreement (IAA) configuration and reporting
Crowdsourcing workforce management panel
API-driven data export endpoint for labeled dataset
Use Cases
For Developers
Accelerating Model Training with Ground Truth Data
ML engineers leverage the platform to generate high-fidelity labeled datasets for supervised learning, reducing model bias and improving generalization. This includes tasks like object detection, semantic segmentation, natural language understanding, and audio transcription
How to Use Defined.ai (formerly Figure Eight)
Access Project Creation Interface
Navigate to the project creation section, select the relevant data modality (e.g., image, text, audio), and upload raw data files or connect a data source via API or cloud storage integration
Defined.ai (formerly Figure Eight) Alternatives
CloudFactory
Managed workforce for data processing.
Alegion (Acquired by TELUS International)
Data labeling and model training services.
V7 Labs
Training data platform focused on vision AI.
Kili Technology
Data labeling platform for enterprise AI.
About Defined.ai (formerly Figure Eight)
Platforms
Categories
Domaindefined.ai
Video Mentions
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Defined.ai (formerly Figure Eight) Status
Active
Service is operational